01 - Preheat the oven to 350°F. Lightly grease a 9x9-inch baking dish with butter or non-stick spray.
02 - Combine rolled oats, chopped nuts, baking powder, ground cinnamon, ground nutmeg, and salt in a large mixing bowl.
03 - In a separate bowl, whisk together milk, eggs, melted butter, maple syrup, and vanilla extract until smooth.
04 - Pour the wet mixture into the dry ingredients. Stir gently until fully combined.
05 - Fold in diced apples and dried fruit, ensuring an even distribution throughout the mixture.
06 - Spread the oatmeal mixture evenly into the prepared baking dish.
07 - Bake for 35 minutes until the top is golden brown and the bake is set. Cool for 5 minutes before serving.